scholarly journals Calcium isotopic patterns in enamel reflect different nursing behaviors among South African early hominins

2019 ◽  
Vol 5 (8) ◽  
pp. eaax3250 ◽  
Author(s):  
Théo Tacail ◽  
Jeremy E. Martin ◽  
Florent Arnaud-Godet ◽  
J. Francis Thackeray ◽  
Thure E. Cerling ◽  
...  
Keyword(s):  
Breast Milk ◽  
South African ◽  
Early Life ◽  
Tooth Enamel ◽  
Biological Evolution ◽  
Milk Consumption ◽  
Interbirth Interval ◽  
Australopithecus Africanus ◽  
The Social ◽  
Life Behavior

Nursing is pivotal in the social and biological evolution of hominins, but to date, early-life behavior among hominin lineages is a matter of debate. The calcium isotopic compositions (δ44/42Ca) of tooth enamel can provide dietary information on this period. Here, we measure the δ44/42Ca values in spatially located microsized regions in tooth enamel of 37 South African hominins to reconstruct early-life dietary-specific variability in Australopithecus africanus, Paranthropus robustus, and early Homo. Very low δ44/42Ca values (<−1.4‰), indicative of milk consumption, are measured in early Homo but not in A. africanus and P. robustus. In these latter taxa, transitional or adult nonmilk foods must have been provided in substantial quantities relative to breast milk rapidly after birth. The results suggest that early Homo have continued a predominantly breast milk–based nursing period for longer than A. africanus and P. robustus and have consequently more prolonged interbirth interval.

scholarly journals Stable isotopes in fossil hominin tooth enamel suggest a fundamental dietary shift in the Pliocene

2010 ◽  
Vol 365 (1556) ◽  
pp. 3389-3396 ◽  
Author(s):  
Julia A. Lee-Thorp ◽  
Matt Sponheimer ◽  
Benjamin H. Passey ◽  
Darryl J. de Ruiter ◽  
Thure E. Cerling
Keyword(s):  
South African ◽  
Tooth Enamel ◽  
Dietary Shift ◽  
Australopithecus Africanus ◽  
Isotopic Evidence ◽  
High Resolution Analysis ◽  
Resolution Analysis ◽  
Dietary Ecology ◽  
Dietary Shifts ◽  
Fossil Hominin

Accumulating isotopic evidence from fossil hominin tooth enamel has provided unexpected insights into early hominin dietary ecology. Among the South African australopiths, these data demonstrate significant contributions to the diet of carbon originally fixed by C 4 photosynthesis, consisting of C 4 tropical/savannah grasses and certain sedges, and/or animals eating C 4 foods. Moreover, high-resolution analysis of tooth enamel reveals strong intra-tooth variability in many cases, suggesting seasonal-scale dietary shifts. This pattern is quite unlike that seen in any great apes, even ‘savannah’ chimpanzees. The overall proportions of C 4 input persisted for well over a million years, even while environments shifted from relatively closed ( ca 3 Ma) to open conditions after ca 1.8 Ma. Data from East Africa suggest a more extreme scenario, where results for Paranthropus boisei indicate a diet dominated (approx. 80%) by C 4 plants, in spite of indications from their powerful ‘nutcracker’ morphology for diets of hard objects. We argue that such evidence for engagement with C 4 food resources may mark a fundamental transition in the evolution of hominin lineages, and that the pattern had antecedents prior to the emergence of Australopithecus africanus . Since new isotopic evidence from Aramis suggests that it was not present in Ardipithecus ramidus at 4.4 Ma, we suggest that the origins lie in the period between 3 and 4 Myr ago.

scholarly journals The Australopithecines – An Extinct Group of Human Ancestors: My Scientific Interest in South Africa

Werkwinkel ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. 7-17
Author(s):  
Katarzyna A. Kaszycka
Keyword(s):  
South Africa ◽  
South African ◽  
Taxonomic Status ◽  
Morphological Description ◽  
Australopithecus Africanus ◽  
The Social ◽  
History Of ◽  
The Subject ◽  
Australopithecus Robustus ◽  
Extinct Group

Abstract I introduce the subject of my research interest in South Africa - the australopithecines - a group of bipedal, small-brained and large-toothed creatures from the Plio-Pleistocene, from which the human genus arose. I then briefly discuss various topics of my research, concerning: (1) Taxonomic status and morphological description of the extinct human relative from the Kromdraai site (Australopithecus robustus); (2) Graphic reconstruction of the partial skull from Kromdraai - specimen numbered TM 1517; (3) Assessment of size sexual dimorphism of the South African australopithecines (Australopithecus robustus and Australopithecus africanus), which, in terms of facial features, was pronounced - being almost gorilla-sized; (4) Social behavior of a fossil hominid species from around 2 million years ago, which, in terms of the social structure, was most likely a multimale-multifemale one; and (5) An event from the history of paleoanthropology, concerning the content of the 1924/25 photographs of the Taung Child (Australopithecus africanus) - the first australopithecine skull discovered.

Policy Design for Non-anthropocentric Pathways to Protect Biodiversity and Re-generate the Land

2018 ◽  
Vol 4 ◽  
Author(s):  
Janet Judy McIntyre-Mills
Keyword(s):  
South African ◽  
Policy Design ◽  
Ways Of Knowing ◽  
Vocational Education And Training ◽  
African Renaissance ◽  
The Social ◽  
Policy Suggestions ◽  
Sentient Beings ◽  
Political Economic ◽  
And Training

This article is a thinking exercise to re-imagine some of the principles of a transformational vocational education and training (VET) approach underpinned by participatory democracy and governance, and is drawn from a longer work on an ABC of the principles that could be considered when discussing ways to transform VET for South African learners and teachers. The purpose of this article is to scope out the social, cultural, political, economic and environmental context of VET and to suggest some of the possible ingredients to inspire co-created design. Thus the article is just a set of ideas for possible consideration and as such it makes policy suggestions based on many ways of knowing rooted in a respect for self, others (including sentient beings) and the environment on which we depend. The notion of African Renaissance characterises the mission of a VET approach in South Africa that is accountable to this generation of living systems and the next.

scholarly journals Social environment influences the relationship between genotype and gene expression in wild baboons

2013 ◽  
Vol 368 (1618) ◽  
pp. 20120345 ◽  
Author(s):  
Daniel E. Runcie ◽  
Ralph T. Wiedmann ◽  
Elizabeth A. Archie ◽  
Jeanne Altmann ◽  
Gregory A. Wray ◽  
...  
Keyword(s):  
Gene Expression ◽  
Individual Differences ◽  
Social Environment ◽  
Group Size ◽  
Early Life ◽  
Social Connectedness ◽  
Dominance Rank ◽  
Social Stressors ◽  
The Social ◽  
Wild Baboons

Variation in the social environment can have profound effects on survival and reproduction in wild social mammals. However, we know little about the degree to which these effects are influenced by genetic differences among individuals, and conversely, the degree to which social environmental variation mediates genetic reaction norms. To better understand these relationships, we investigated the potential for dominance rank, social connectedness and group size to modify the effects of genetic variation on gene expression in the wild baboons of the Amboseli basin. We found evidence for a number of gene–environment interactions (GEIs) associated with variation in the social environment, encompassing social environments experienced in adulthood as well as persistent effects of early life social environment. Social connectedness, maternal dominance rank and group size all interacted with genotype to influence gene expression in at least one sex, and either in early life or in adulthood. These results suggest that social and behavioural variation, akin to other factors such as age and sex, can impact the genotype–phenotype relationship. We conclude that GEIs mediated by the social environment are important in the evolution and maintenance of individual differences in wild social mammals, including individual differences in responses to social stressors.

The Everyday in a Time of Transformation: Exploring a Single South African Lifeworld after 20 Years of Democracy

2017 ◽  
Vol 13 (1) ◽  
pp. 32-54
Author(s):  
P. Conrad Kotze ◽  
Jan K. Coetzee
Keyword(s):  
Social Sciences ◽  
South Africa ◽  
South African ◽  
Sociological Research ◽  
Contemporary Debate ◽  
The Social ◽  
The Everyday ◽  
Ontological Turn ◽  
The Individual ◽  
Epistemological Framework

Transformation has come to be a defining characteristic of contemporary societies, while it has rarely been studied in a way that gives acknowledgement to both its societal effects and the experience thereof by the individual. This article discusses a recent study that attempts to do just that. The everyday life of a South African is explored within the context of changes that can be linked, more or less directly, to those that have characterized South Africa as a state since the end of apartheid in 1994. The study strives to avoid the pitfalls associated with either an empirical or solely constructivist appreciation of this phenomenon, but rather represents an integral onto-epistemological framework for the practice of sociological research. The illustrated framework is argued to facilitate an analysis of social reality that encompasses all aspects thereof, from the objectively given to the intersubjectively constructed and subjectively constituted. While not requiring extensive development on the theoretical or methodological level, the possibility of carrying out such an integral study is highlighted as being comfortably within the capabilities of sociology as a discipline. While the article sheds light on the experience of transformation, it is also intended to contribute to the contemporary debate surrounding the current “ontological turn” within the social sciences.

Folklorisation and the Emergent Moral Degeneration: A Functionalist Approach

2021 ◽  
Vol 30 (1) ◽  
Author(s):  
Siziwe Mandubu
Keyword(s):  
Young People ◽  
South African ◽  
Moral Judgments ◽  
Behavioral Norms ◽  
South African Society ◽  
Moral Principles ◽  
Societal Norms ◽  
Moral Standards ◽  
The Social ◽  
Functionalist Approach

Living in an egalitarian society has resulted in the corrosion of the moral base among certain sectors in the community. Some people misconstrue egalitarianism as an authorisation to act as they see fit. Young people, in particular, are gradually losing touch with reality in relation to acceptable behavioral norms in the South African society. Based on the functionalist theory of balancing the social equilibrium among people, the article delineates moral standards as the most fundamental and general principles of behaviour and reflects on how the society expects one to act in certain situations. The article, therefore, explores the primary concepts within functionalism and attempts to outline that the society is a system of interconnected parts that work together in harmony to maintain a state of stability and social cohesion. The article will use the folktale “uDyakalashe noMvolofu” (“The Jackal and the Wolf”) to reflect on the expected societal norms. It demonstrates that folktales, which used to transfer values, morals and shape the conduct of people in the olden days are still appropriate in reshaping the outlook and perceptions of today’s generation. As such, the shrewd nature of folklore in the moral regeneration of the current generation of young people is exposed. While there are many folktales in this category, “uDyakalashe noMvolofu” (“The Jackal and the Wolf”) provides the theme relevant for the analysis of the topic to highlight that moral standards generate moral principles and moral judgments.

scholarly journals Exploring the impact of early life factors on inequalities in risk of overweight in UK children: findings from the UK Millennium Cohort Study

2016 ◽  
Vol 101 (8) ◽  
pp. 724-730 ◽  
Author(s):  
Samuel Massion ◽  
Sophie Wickham ◽  
Anna Pearce ◽  
Ben Barr ◽  
Catherine Law ◽  
...  
Keyword(s):  
Early Life ◽  
Social Inequalities ◽  
Childhood Overweight ◽  
Smoking During Pregnancy ◽  
The Social ◽  
Maternal Smoking During Pregnancy ◽  
Early Life Factors ◽  
Uk Millennium Cohort Study ◽  
The Uk ◽  
Academic Qualifications

BackgroundOverweight and obesity in childhood are socially patterned, with higher prevalence in more disadvantaged populations, but it is unclear to what extent early life factors attenuate the social inequalities found in childhood overweight/obesity.MethodsWe estimated relative risks (RRs) for being overweight (combining with obesity) at age 11 in 11 764 children from the UK Millennium Cohort Study (MCS) according to socio-economic circumstances (SEC). Early life risk factors were explored to assess if they attenuated associations between SECs and overweight.Results28.84% of children were overweight at 11 years. Children of mothers with no academic qualifications were more likely to be overweight (RR 1.72, 95% CI 1.48 to 2.01) compared to children of mothers with degrees and higher degrees. Controlling for prenatal, perinatal, and early life characteristics (particularly maternal pre-pregnancy overweight and maternal smoking during pregnancy) reduced the RR for overweight to 1.44, 95% CI 1.23 to 1.69 in the group with the lowest academic qualifications compared to the highest.ConclusionsWe observed a clear social gradient in overweight 11-year-old children using a representative UK sample. Moreover, we identified specific early life risk factors, including maternal smoking during pregnancy and maternal pre-pregnancy overweight, that partially account for the social inequalities found in childhood overweight. Policies to support mothers to maintain a healthy weight, breastfeed and abstain from smoking during pregnancy are important to improve maternal and child health outcomes, and our study provides some evidence that they may also help to address the continuing rise in inequalities in childhood overweight.

scholarly journals Frontline police employees’ social construction of client service

2007 ◽  
Vol 5 (3) ◽  
pp. 38-47
Author(s):  
Karel Stanz ◽  
G. J. Schwart ◽  
W. J. Schurink
Keyword(s):  
Social Construction ◽  
South African ◽  
Qualitative Methodology ◽  
Organisational Change ◽  
Frontline Employees ◽  
South African Police Service ◽  
The Social ◽  
South African Police ◽  
Satisfaction Model

The social construction of frontline employees’ client service plays a major role in organisational success. This study illuminated why frontline personnel are reluctant to accept organisational change which is in line with new policing philosophies. Applying modernist qualitative methodology, and particularly grounded theory within a case study design a ‘process satisfaction model’ was developed with the aim to improve employee satisfaction with internal processes and ultimately service delivery. This model may be used for change in the South African Police Service SAPS) and other government departments.

scholarly journals "From The Worst To The Best": An Exploratory Qualitative Study Of The Process Of Social Change At A South African Secondary School

2003 ◽  
Vol 2 (1) ◽  
Author(s):  
Berendien Van Aswegen ◽  
Willem Schurink
Keyword(s):  
South African ◽  
Social Process ◽  
Organisational Change ◽  
Gauteng Province ◽  
Process Of Change ◽  
The Social ◽  
Role Players ◽  
Analyse Data ◽  
Ineffective Schools ◽  
Disadvantaged School

The primary aim of the study is to describe an initiative to effect organisational change at a previously disadvantaged school in South Africa’s Gauteng Province. Qualitative methods were used to collect and analyse data on the social process of change in the school. Essays of role players in the change process on their experiences led to important insights. This exploratory study points to a process that was effective in bringing about change at a school and holds promise for constructing a theoretical model of how change could be effected in ineffective schools. OpsommingDie primêre doel van die studie is die beskrywing van ’n organisatoriese verandering by ’n voorheen benadeelde skool in Suid-Afrika se Gauteng Provinsie. Kwalitatiewe metodes is gebruik om data oor die sosiale proses te genereer en te analiseer. Opstelle van betrokkenes by die veranderingsproses oor hulle ervarings het tot belangrike insigte gelei. Hierdie verkennende studie dui op ’n proses wat suksesvol gewerk het om verandering te weeg te bring en hou belofte in vir die ontwikkeling van ’n teoretiese model van hoe verandering in oneffektiewe skole bewerkstellig kan word.

scholarly journals Root grooves on two adjacent anterior teeth of Australopithecus africanus

2017 ◽  
Author(s):  
Ian Towle ◽  
Joel D. Irish ◽  
Marina Elliott ◽  
Isabelle De Groote
Keyword(s):  
South African ◽  
Root Surface ◽  
Dental Erosion ◽  
Tissue Loss ◽  
Cervical Lesions ◽  
Dental Tissue ◽  
Australopithecus Africanus ◽  
Food Items ◽  
Anterior Teeth ◽  
Fossil Hominin

AbstractTooth root grooves and other ante-mortem dental tissue loss not associated with caries found on or near the cementoenamel junction (CEJ) are commonly termed non-carious cervical lesions. Three main processes are implicated in forming these lesions: abrasion, dental erosion, and abfraction. As yet, these lesions have not been described in non-Homo hominins. In this study South African fossil hominin collections were examined for evidence of any type of non-carious cervical lesion. Only one individual shows ante-mortem root grooves consistent with non-carious cervical lesions. Two teeth, a mandibular right permanent lateral incisor (STW 270) and canine (STW 213), belonging to the same Australopithecus africanus individual, show clear ante-mortem grooves on the labial root surface. These lesions start below the CEJ, extend over a third of the way toward the apex, and taper to a point towards the lingual side. Microscopic examination revealed no clear directional striations. The shape of these grooves is extremely similar to clinical examples of dental erosion, with the lack of striations supporting this diagnosis. These are the oldest hominin examples of non-carious cervical lesions and first described in a genus other than Homo; further, the lesions suggest that this individual regularly consumed or processed acidic food items.

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